1012220 has 48 divisors (see below), whose sum is σ = 2395008. Its totient is φ = 356160.

The previous prime is 1012217. The next prime is 1012229. The reversal of 1012220 is 222101.

Added to its reverse (222101) it gives a square (1234321 = 1111²).

1012220 = T₂₃₁ + T₂₃₂ + ... + T₂₆₃.

It is a junction number, because it is equal to n+sod(n) for n = 1012198 and 1012207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9407 + ... + 9513.

It is an arithmetic number, because the mean of its divisors is an integer number (49896).

2^1012220 is an apocalyptic number.

1012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1012220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1197504).

1012220 is an abundant number, since it is smaller than the sum of its proper divisors (1382788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1012220 is a wasteful number, since it uses less digits than its factorization.

1012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 1012220 is about 1006.0914471359. The cubic root of 1012220 is about 100.4056853021.

Adding to 1012220 its reverse (222101), we get a palindrome (1234321).

The spelling of 1012220 in words is "one million, twelve thousand, two hundred twenty".